Romo’s last interception was a crusher for the Cowboys, coming with just over three minutes to play, when he floated a swing pass into the arms of Redskins linebacker Rob Jackson. The Cowboys were trailing 21-18 at the time, and instead of going on a potential game-tying or game-winning drive, they were deflated and the Redskins were soon celebrating.

Here are three things we learned as we watched Dallas’ season end and the Redskins advance to a first-round matchup at home against the Seattle Seahawks next Sunday:

1. Alfred Morris can carry the Redskins’ offense. Morris (200 yards on 33 carries, three touchdowns) was the star, not Robert Griffin III. It seemed as if Morris never went down on the first hit. He broke tackles. He broke long runs. And eventually, he broke the Cowboys’ spirit. Morris, a sixth-round rookie with first-round impact, is the latest running back find for Redskins coach Mike Shanahan. Morris looked fresh like it was Week 1, not Week 17. Young legs and talent—Morris has both.

2. Romo makes too many mistakes to be a championship quarterback. Shouldn’t the rookie quarterback make the big mistakes, not the veteran? Griffin (9-for-18, 100 yards passing, 63 yards rushing) wasn’t even 100 percent, limping around on the knee he sprained earlier this month. But Griffin converted key first downs and did not have any giveaways. Not Romo, who squandered another opportunity and was a lonely figure walking dejectedly off the field after the game. There will be little mercy for Romo, who faces another long offseason.

3. The Redskins' defense is no longer a liability. Washington hurried Romo with blitz packages, and the Redskins kept the Cowboys from making game-breaking plays. Redskins corner DeAngelo Hall did a superb job covering Dez Bryant, and the Redskins’ defense did what it had to to do to keep their season alive.